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English: This upload is a re-worked version of the existing chart on the Xterm page, the existing chart has been placed in the public domain by its author, bmdavll. I am also placing my SVG version in the public domain.
There exist many algorithms to pick the colors through color quantization; one well known is the Heckbert's median-cut algorithm. Here is the 8-bit, 256 color palette used with the color test chart and the image sample above: Adaptive palettes only work well with a unique image. Trying to display different images with adaptive palettes over an ...
For each unique palette, an image color test chart and sample image (truecolor original follows) rendered with that palette (without dithering) are given. The test chart shows the full 256 levels of the red, green, and blue (RGB) primary colors and cyan, magenta, and yellow complementary colors, along with a full 256-level grayscale.
Chart of the 256 colors available in an xterm with color support. XTerm color numbers and RGB values are shown for each. (Updated 2024) As with most X applications, ...
The test chart shows the full 8-bit, 256 levels of the red, green and blue primary colors and cyan, magenta and yellow complementary colors, along with a full 8-bit, 256 levels grayscale. Gradients of full saturation of intermediate colors (orange, yellow-green, green-cyan, blue-cyan, violet, and red-magenta), and a full hue spectrum are also ...
This article is a list of the color palettes for notable computer graphics, terminals and video game console hardware. Only a sample and the palette's name are given here. More specific articles are linked from the name of each palette, for the test charts, samples, simulated images, and further technical details (including references).
A different set of 16 simultaneous colors is available using an NTSC TV or composite monitor by using artifact color techniques, with independent groups having demonstrated much larger color sets of over 256 colors See Color Graphics Adapter#High color depth. The CGA RGBI palette is a variant of the 4-bit RGBI schema, arranged internally like ...
The Atari ST series has a digital-to-analog converter of 3-bits, eight levels per RGB channel, featuring a 9-bit RGB palette (512 colors).Depending on the (proprietary) monitor type attached, it displays one of the 320×200, 16-colors and 640×200, 4-colors modes with the color monitor, or the high resolution 640×400 black and white mode with the monochrome monitor.